feat: enhance UDPClient initialization with local port binding and add WebServerHandler for HTTP server management

main/network/udp_client.h

@@ -19,9 +19,10 @@ public:
 
     /**
      * @brief Initialize UDP socket
+     * @param local_port Local port to bind to (0 = system assigns port)
      * @return ESP_OK on success, error code otherwise
      */
-    esp_err_t init();
+    esp_err_t init(uint16_t local_port = 0);
 
     /**
      * @brief Configure remote endpoint